Hardinge, Frances
Elex Media Komputindo , 2020
Buku Teks SO
Freudenthal, Hans
Academic Press, 1987
Buku Teks SO
edited by A.L. Onishchik
Springer-Verlag, 1993
Buku Referensi
Hilgert, Joachim
Springer, 2012
eBooks
edited by Anthony Joseph, Anna Melnikov and Ivan Penkov
Springer, 2012
eBooks